First, the working principle is based on the hydraulic actuating lever hydraulic Rama directly forward movement, so push rod itself does not make the rotation. Hook claw can be made directly with the thread pitch forward and back of the front and rear handle operation as long as the small amplitude swing, hydraulic actuating lever forward, the corresponding hook claw back, the object is pulled out. Second, the application is an alternative to traditional hydraulic Rama Rama idealized new tools. Easy to operate, effort, without space constraints, this Rama compact structure, flexible, light weight, small size, easy to carry, suitable for factories, repair places. Third, the use of methods and precautions 1, when using the slotted end of the handle first set into the oil return valve stem and valve stem oil return tighten clockwise. 2, the adjustment to claw claw hook to seize the pull objects. 3, insert the lift handle hand hole round starting piston rod forward smoothly tilted forward, claw back accordingly, the object is pulled out. 4, starting piston rod hydraulic Rama effective from only 50mm, it stretched from no larger than 50mm, stop when there is no pull, release the oil return valve, so that the piston rod is retracted to start when in use, and then a second time after a good tune Repeat steps 1, 2, pulled out so far. 5, purports to retract the piston rod to start, simply use the handle end of the slotted oil return valve stem counterclockwise slightly loosen the piston rod in the spring start gradually retraction. 6, prior to use should be based on the outer diameter of the object is pulled, and pulled away from the loading force, select the appropriate tonnage hydraulic Rama, avoid overloading, to avoid damage. 7, the hydraulic Rama at -5 ℃ ~ 45 ℃ in use, the use of (GB443-84) N15 machine oil; use at -20 ℃ ~ -5 ℃, using (GB442-64) synthetic spindle oil. 8, in order to prevent equipment damage caused by overloading, overloading hydraulic unit equipped with automatic unloading valve, when the object is pulled over the rated load, supercharged valve will automatically unloading, and instead choose a larger tonnage hydraulic Rama.